Annual starting salaries for college graduates with degrees

Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $30,000 and $45,000. Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired. How large a sample should be taken if the desired margin of error is: $500? $200? $100? Would you recommend trying to obtain the $100 margin of error? Explain.

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